255240.02 SECTION 239—SODIUM CHLORIDE AND CALCIUM CHLORIDE
239.01 Description
These specifications cover chloride used as a stabilizer or to control snow and ice.
239.02 Detail Requirements
a.Sodium chloride shall conform to AASHTO M143, Type I, with the following exceptions:
1.The sodium chloride content shall be at least 97 percent of the dry weight.
2.The moisture content shall be not more than 5 percent.
3.When shipped in bulk, sodium chloride shall contain an anticaking additive.
4.Sodium chloride will be tested in accordance with VTM-28. When practicable, the Engineer will take samples at the source from indoor storage or from adequately protected outdoor storage at the rate of approximately one sample per 4,000 tons. Samples will not be taken from uncovered storage. The Engineer will take samples at the destination at the time of delivery when inspection at the source is not practicable, or when material is shipped directly from uncovered storage. Inspection service will be provided when the frequency of shipments from approved stock at the source, makes it economically justified. The Inspector’ s stamp on the shipping or delivery report will indicate inspection of the shipments. When inspection service is not provided, the supplier may ship material but shall certify that the sodium chloride came from an approved source. An authorized representative of the supplier shall sign the certification if it is stamped on the shipping or delivery report.
b.Calcium chloride shall conform to AASHTO M144. SECTION 240—LIME
240.01 Description
These specifications cover lime to be used as a stabilizer or soil conditioner.
240.02 Detail Requirements
a.Hydrated lime shall conform to ASTM C207, Type N, except that the average percentage of calcium oxide shall be at least 93. Single test results shall not be below 90 percent.
b.Hydraulic lime shall conform to ASTM C141. 256240.02
c.Agricultural lime:
1.Ground limestone shall be of such fineness that at least 86 percent will pass a No. 20 mesh screen, at least 47 percent will pass a No. 60 mesh screen, and at least 28 percent will pass a No. 100 mesh screen. Material shall have a calcium carbonate equivalent of at least 85 percent.
2.Pulverized limestone shall be of such fineness that at least 90 percent will pass a No. 20 mesh screen, and at least 66 percent will pass a No. 100 mesh screen. Material shall have a calcium carbonate equivalent of at least 85 percent.
d.Lime for soil stabilization shall be quicklime or hydrated lime conforming to AASHT0 M216. SECTION 241—FL Y ASH
241.01 Description
These specifications cover fly ash (burnt coal residue) used as an additive in hydraulic cement concrete or as a soil stabilizer.
241.02 Detail Requirements
a.Fly ash used in hydraulic cement concrete shall conform to ASTM C618, Class F , or Class C.
b.Fly ash used in lime stabilization shall conform to ASTM C593. The Engineer may approve the use of bulk material if requested. SECTION 242—FENCES
242.01 Description
These specifications cover material requirements for fence components used in the construction of chain link, pedestrian, barbed wire, woven wire, and lawn fences and material specifications for temporary silt fences, geotextile fabric silt barriers, and filter barriers used for erosion and sediment control.
242.02 Detail Requirements
Steel posts and braces for standard fence and chain link fence may be fabricated from pregalvanized material in lieu of galvanization after fabrication provided ends and other areas of exposed metal are satisfactorily treated or repaired using a material conforming to Section 233.
a.Chain Link and Pedestrian Fences: Fabric material shall be new 9-gage core conforming to the following:
Source: Virginia Road and Bridge Specifications, 2020 Edition. Pages 283–283 of 1,065.